Punching machine



W. H. DARDENNE PUNCHING MACHINE I Filed Aug. 12 1920 3 Sheets-Sheet 1men/tor.- MLWKBSS Wlierflfiflrdenne,

Dec. 4 1923. 1,476,669

' w. H. DARDENNE PUNCHING MACHINE Filed Aug. 12

1920 3 Sheets-Shea} 2 denim;

Min ess W. H. DARDENNE PUNCHING MACHINE 1 Dec. 4, 1923. 1, 4

Filed Aug. 12 1920 s Sheets-Shoot 5 Patented Dec. 4, 1923.

umran stares I 1,476,669 rena OFFICE.

WALTERH. DARDENNE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOB TO EDWARD G.BUDD MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A COR-PORATION OF PENNSYLVANIA.

PUNCHING MACHINE.

Application filed August 12, 1920. Serial No. 403,019.

to punchlng provide a machine of the character referred to wherein aplurality of punches may be operated simultaneously.

A further object is to provide a punching machine in which punchesdisposed and operating in relatively different planes are simultaneouslyactuated to produce holes in the work to be punched at relativelydifferent distances from a given fixed plane.

A further object is to provide means in a machine of the nature referredto for efficiently supporting, centering and clamping the work.

Other objects of the invention will appea more fully hereinafter.

The invention consists substantially in the construction, combination.location and relative arrangement of parts, all as will be more fullyhereinafter set forth. as illustrated in the accompanying drawings. andfinally pointed out in the appended claims.

Referring to the drawings,-

Fig. I is a view in top plan ofa machine embodying my invention showinga portion of the work to be punched arranged in wrking position in themachine. part of the work being broken away to show one set or gang ofpunches;

Fig. II is a view in side elevation of the machine illustrated in Fig.I:

Fig. III is a view in vertical section on the line III -III. Fig. II,looln ng in the direction of the arrows. and showingthe work-holdingclamps in clamping position on the work. and the punches advanced;

Fig. I" is a view similar to Fig. III showin; the work-holding clampsraised from the work and the punches retracted; and

Fig. V is a detail view in section on the line V-V, Fig. 11, looking inthe direction of the arrows. and showing details of a form of clutchmechanism employed in connection with my invention.

The. same part is indicated by the same reference numeral wherever itoccurs throughout the several views.

In the manufacture of various structures out of sheet metal, such, forexample, as automobile bodies, it is frequently necessary for varioususes and purposes, to punch holes in the sheet metal panels or stampingsemployed, or in the edge flanges thereof.

Where the stamping or panel is of irregular contour or shape, as, forexample, in the case of the side panels for automobile bodies, and theinturned flanges thereof at the door openings, due to the curvature ofsuch panels to conform to the contour and lines of the body. itfrequently is necessary to punch or otherwise produce holes in oneportion or flange of the stamping or panel which lie in a. differentplane from those punched or formed in the other flange or anotherportion of the stamping or panel. In the case of flanged panels orstampings of an automobile body structure, for illustration. due to'thecurvature of the panels or stampings, the flange at one edge, in whichholes are to be formed, lies at one distance from a. fixed plane, forinstance, the plane of the base of the work support, while the flange atthe other edge of such stamping or panel lies at a different distancefrom such plane.

Heretofore it has been a common practice to form the holes in sheetsteel stampings or panels one at a time, particularly where the holesare to be formed in relatively differentplanes as above defined. thatis, in stampings or panels of curved or irregular shape and contour.This practice is not only slow and tedious. but is costly dueto thenecessary repeated handling of the stampings in presenting the same tothe punches or drills, the breakage of drills and punches. and the timerequired to complete the work on each stamping or panel. therebymaterially adding to the cost of the completed structure in which thestampings are to be employed. In the case of an automobile body, forinstance. the cost of construction according to the common practice isvery substantially increased.

It is among the special purposesof the present invention to provide a.punching ma- In the accompanying drawings-I have shown my invention asapplied to the forming of holes or openings in sheet metal stampings orpanels em loyed in the construction of automobile bodies, andparticularly in this instance in the edge flanges of such panels orstampings where the holes or openings are to be formed at differentdistances from the plane defined by the base portion of the support uponwhich the stampings are carried while the holes or openings are beingformed therein. It is to be understood, however, that my invention isnot to be limited or restricted with respect to the use to which thestampings or panels are to be employed.

In the arrangement shown, the panel is indicated at A. As clearlyindicated in Figs. 1, III and IV, the panel is formed with edge flanges,the holes or openings being formedin the said flanges, and the saidpanel or stamping is transversely inclined or curved so that the edgesof the panel do not lie in the same plane. The panel to be punched maybesupported in any suitable or convenient way. A simple arrangement isshown whereinat the point where the punching operations are carried onthe panel rests upon a work support or bed 80 carrying dies 81 overwhich the respective edge flanges of the panel engage, said dies beingat relatively different distancesjroni the plane of the base of thesupport 80. In order to support the stamping in position upon the Workbed or support 80 and the flanges thereof respectively engaging over thedies 81 I provide suitable work supporting members 46, 54, suitablysecured to a vertically extending standard 42 of the machine frame work,as indicated at 47. The work supporting arms 46, 54, may be braced, ifdesired, by the braces 51, 58, mounted at convenient points upon theframe work, as indicated at 52, and connected at their outer ends to theouter portions of the work supporting arms 46. 54, as indicated at Theextremities 49, 56, of the supporting arms 46, 54, are formed with gaugestops 50 o7, upon which the extremities of the stamping are supported inposition. For certain classes of stampings to be punched it is desirableto form the supporting arms with downwardly inclined portions asindicated at 48, 55, to conform to the shape of the stampin'gs.

In the arrangement shown, a work supporting arm is disposed at each sideof the machine in order to accommodate both right hand and left handpanels or stampin s, the work being presented to the action of t 1epunching devices from one side or the other of the machine according towhether it is a right or left hand panel.

Cooperating with the dies 81 are the punches indicated at 79. These arecarried in blocks 78 which are mounted to slide in suitable ways formedin the frame work of the machine. These punches may be ad vanced totheir work or withdrawn therefrom in many different ways. A simplearrangement for this purpose is shown wherein toggle links 72, 76, arepivotally connected together as indicated at 74 at their proximate ends,one of said links being pivotally connected to a slide block 78, and theother being pivotally connected as at 73 to a fixed projection 78forming partof the framework. Rock levers 64 are pivotally connected tothe pivot pins 7 4 of the toggle links through link connections 75,which are pivotally connected as at 77, to said rock levers. These rocklevers are pivotally suspended as at 67 upon links 66 which arepivotally mounted upon portions 44 of the frame work of the machine. Theother ends of levers 64 are pivotally. connected as at to a slide block63 mounted to slide in fixed ways 43.

It is desirable to clamp and hold the panel or stamping firmly inposition upon the work support 80 during the operation of the punches.Various constructions of clamp devices for this purpose may be employed.A simple arrangement is shown wherein clamping feet carrying suitableclamp pads 88 are adjustably mounted in a mem ber 84 pivotally mountedas at 83 upon a fixed part of the frame work. A desirable adjustment ofthe clamping feet may be secured by means of the lock nuts 87 engagingthe threaded ends of the shanks 86 of the clamp feet. The members 84 mayhe rocked in any suitable or convenient manner into position for theclamping feet or the pads carried thereby to engage and efficiently holdthe stampings in position, and also to'be rocked or swung out ofclamping position. A simple arangement is shown wherein a lever 91 ispivotally mounted as at 90 in fixed portion 82 of devices to engageagainst the edge of the bead when the clamping devices are in clampingposition, thereby insuring the proper positioning of the stamping forthe holes to be punched at the proper distances.

Any suitable arrangement for rocking the power actuated levers 64 may beemployed. A simple arrangement is shown, to which, however, I donot'desire to be limited or restricted, wherein, as above described, theends of said rock levers are pivotally connected to the slide block 63.To this slide block is connected a pitman 62 which is pivotallyconnected as at 61 to an eccentric pin carried 'by a disk or wheelmember 59, see Fig. I. This wheel or disk may be power drivenandcontrolled in many different ways. In the particular arrangementshown. to which my invention is not to be limited or restricted, saiddisk is mounted upon the end of a shaft and secured thereto to rotatetherewith as indicated at 60. This shaft 19 extends into a hub portion40' forming part of an extension 40 of the frame work of the machine,which constitutes a housing for the drive wheel 59. The other end ofshaft 19 is journalled in a bearing 20. A gear wheel 18 is mounted torevolve loosely upon shaft 19 and is driven in any suitable manner froma convenient source of power, for instance, from a motor 11 through theintermeshing gears 12, 13, respectively mounted on the motor shaft and acounter shaft 14, the latter mounted in bearings 15,

' 16, and carrying a pinion 17 which meshes with and drives the gear 18.Suitable clutch devices are employed for coupling shaft 19 to rotatewit-h gear 18. A simpie clutch arrangement is shown for this purposewherein pins 22 are carried by the gear 18, which pins in thearrangement shown are positioned at diametrically opposite points withrespect to said gear, and each is provided with a portion 21 whichprojects beyond one of the faces. of said gear. A member 23 is fixedupon to rotate with shaft 19 adjacent the gear 18 and a latch member 25is carried by the clutch member 23. This latch member is formed with anextension 24 formed with a bevelled shoulder and projecting towards thegear 18 to engage one or the other of the projecting portions 21 of thepins 22. The clutch latch 25 may be normally held in position for theprojecting portion 24 thereof to extend into the path of and to engage aprojecting portion 21 of one of the pins To accomplish this a simplearrangement is shown wherein the latch member 25 is formed with a shankwhich extends into a slot or opening in the member 23 and a spring 27interposed between a retainer plate 26, and the inner end of the latch25 normally exerts its tension to project the latch 25 outwardly awayfrom the member 23 and towards the gear 18 and into position for theextension 24 thereof to en- 22. The clutch latch 25 may be moved intoretracted position so as to clear the portions 21 of the pins 22whenever it is desired to arrest the rotations of shaft 19. This may beaccomplished in many different ways. A simple arrangement is shownwherein a control lever 28 is pivotally mounted upon the frame work asindicated at 30 and is formed with a treadle portion 29 conveniently arranged to be manipulated by an attendant of the machine. The other endof said lever is connected by means of a link 31 to one end of a lever32 pivotally mounted in a convenient bracket 35 and having its free endindicated at 36 suitably bevelled and arranged to be projected intoposition to engage the extension 24 of the latch 25 in the course ofrotation of the member 23, thereby forcing the latch 25 into its seat oropening in said member and against the action of spring 27, therebycausing the latch member 25 to be cleared by the extensions 21 of thepins 22 of the continuously rotating gear 18, permitting said gear tocontinue to rotate without imparting its rotations to the shaft 19 andconsequently arresting the action of the punches. The lever 32 isnormally held in position for the free end 36 thereof to engage theprojection 24 on the latch member 25 by means of a spring 34 connectedto said lever. A spring 94 connected to the foot lever 28 aids inserving the same purpose. When, however, the foot lever 28 is depressedagainst the action of spring 94, thereby rocking lever 32 against theaction ot' spring 34, the end 36 of lever 32 is withdrawn, and thereuponthe driving power is coupled to shaft 19, and hence the punching devicesare power actuated to their work.

The various working parts may be mounted on any suitable arrangement offramework having the features above indicated. A simple arrangement isshown including a base plate 10 upon which the motor, counter shaft 14,and shaft 19, and their gearing connections, are mounted. The punchingdevices, work holder, and clamping devices are mounted upon a standard42, suitably secured upon the base plate.

It is believed that the operation of the machine will be fullyunderstood from the foregoing description. The work to be punched isplaced in position upon a supporting arm 46 or 54,'as the case may be,and resting upon the work support 80, and in case of. an irregularlyshaped stamping which is flanged at its edges, where the holes are to bepunched in edge flanges of the stamping, said flanges are engaged overthe dies 81 of the work support, these dies being out of line with eachother. The work is clamped into position by the clamping devices and theattendant then depresses the foot lever 28. Thereupon the punches areadvanced on opposite sides towards the work to accomplish theirfunction. It will be observed that the punches are engaged in gangs, onegang of punches operating in a different plane from the other gang ofpunches with reference to the plane defined by the base of the worksupport. The power connections through which the punches are operatedare instantly arrested when the foot lever 28 is released, without,however, arresting the continuous action of the driviDWObOI.

ile I have shown and described my invention for use in. connection withpunching holes in the edge flanges of sheet metal stam'ping for use inthe construction of automobile bodies, and particularly in stampings ofirregular shape, it is obvious that the machine may be employed forpunching holes in other stampings, and for stampings for other uses andpurposes. I do not desire therefore to be limited or restricted inrespect to the use to which such stampings are to be employed, nor tothe particular character of stampings. lit will also be observed thatmany changes and variations in the details of construction andarrangement would readily occur to persons skilled in the art and stillfall within the spirit and scope of my invention. 1 do not desiretherefore to be limited or restricted to the particular construction andarrangement of parts shown and described.

Having thus described my invention, What I claim as new and desire tosecure by Letters Patent is: I

1. A. machine of the class described comprising the combination of awork-support having a plane surface on which the work rests, a diemounted in the side-wall of said work-support, and a punch cooperatingwith said die and mounted to reciprocate in a direction perpendicular tosaid side wall.

2. A machine of the class described comprising the combination of awork-support having a plane surface on which the work. rests, a diemounted in the side-wall of said work-support, a block slidably mountedto reciprocate in a direction perpendicular to said side wall, and aplurality of punches mounted in said block and cooperating with said dieto perforate flange portions of the work.

3. A machine of the class described comprising the combination of awork-support having a plane surface on which the Work rests, a diecarried thereby, a slidably mounted. block, a punch carried thereby andcooperating with said die, a to 'le linkage connected at one end, to afixe abutment and, at the other end, to said block, and means acting onsaid linkage to reciprocate the block in a direction substantiallyparallel to said surface.-

4. A machine of the class described comprising the combination of awork-support, a diemounted in the side wall of said worksupport, a blockslidably mounted to reciprocate in a straight line perpendicular to saidside wall, a punch carried by said block and cooperating with said die,a toggle linkage connected, at one end, to a fixed abutment and, at theother end, to said block, and means acting on said linkage toreciprocate said block.

5. A machine of the class described comprising the combination of awork-support, a die carried thereby, a slidably mounted block, a punchcarried by said block and cooperating with said die, a toggle linkageconnected, at one end, to a fixed abutment and, at the other end, tosaid block, a link connected to the central pivot of said linkage, andmeans for reciprocating said link.

6. A machine of the class described comprising the combination of aslidably mounted punch carrier, a punch carried thereby, a togglelinkage connected, at one end, to a fixed abutment and, at the otherend, to said carrier, a rocker arm suitably fulcrumed, a link connectingsaid arm and the toggle linkage,a reciprocating member to which one endof said arm is connected and means for reciprocating said member.

7. A machine of the class described comprising the combination of adrive shaft, a sliding member reciprocated by said shaft, a rocker arimconnected to said sliding member and suitably fulcrumed, a slidablymounted punch carrier, a punch carried thereby, a toggle linkageconnected, at one end, to a fixed abutment and, at the other end, tosaid carrier, and a link connecting said rocker arm and the togglelinkage.

8. A machine of the class described comprising the combination of aWork-support, means for clamping the work on said support, a pluralityof reciprocating punches mounted to move in a plane substantiallyparallel to the part of the work engaged by said clamping means, andmeans for reciprocating said punches.

9. A machine of the class described comprising the combination of awork-support having a plane surface on which the work rests, a pair ofdies mounted in the opposite side-walls of said work-support, a pair ofslidably mounted punch carriers, punches carried thereby and cooperatingwith said dies, and means for simultaneously reciprocating the punchcarriers towards the worksupport from opposite directions to perforateflange portions of the work.

10. A. machine of the class described comprising the combination of aframe, a pair of posts carried thereby, a, punch-carrier slidablymounted in each post, a punch car ried by. each punch-carrier, means forsimultaneous y reciprocating said punch-carriers emma towards eachother, a work-support positioned between said posts, and dies mount-- edin the opposite side walls of said support and cooperating with saidpunches.

11. A machine of the class described comprising the combination of abase, a standard mounted thereon, a pair of punch-carriers slidablymounted in said standard, punches carried by said carriers, aworksupport positioned between said carriers, a pair of toggle linkages,each connected, at one end, to a fixed abutment and, at the other end,to one, of said punch carriers, and means acting on said linkages tosimultaneously reciprocate said punch-carriers towards the work-support.i

12. A machine of the class described comprising the combination of abase, a. standard mounted thereon, a pair of punchcarriers slidablymounted .in said standard, punches carried by said carriers, aworksupport positioned between said carriers, a pair of toggle linkages,each connected, at one end, toa fixed abutment and, at the other end, toone of said carriers, a link connected to the center of each togglelinkage, and means for simultaneously reciproeating said links toreciprocate the punchcarriers towards the work-support.

13. A machine of the class described comprising the combination of abase, a standard mounted thereon, a pair of punch-carriers slidablymounted :in said standard, punches carried by said carriers, aworksupport positioned between said carriers, a pair of toggle linkages,each connected, at one end, to a fixed abutment and, at the other end,to one of said carriers, a pair of suitably fulcrumed rocker arms, alink connecting each rocker arm with one of said toggle linkages, andmeans for simultaneously oscillating said rocker .arms on theirfulcrums.

14. A machine of the class described comprising the combination of abase, a rotating shaft journaled thereon, a standard mounted on saidbase, a push block reciprocably mounted on said standard, operatinconnections between said shaft and sai block, a pair of punch-carriersslidably mounted in said standard, punches carried by said carriers, awork-support positioned between said carriers, a pair of togglelinkages, each connected, at one end, to a fixed abutment and, at theother end, to one of said carriers, a pair of suitably fulcrumed rockerarms connected at one end to said block, and links connecting the otherends of said arms and said toggle linkages.

15. A machine of the class described comprisingthe combination of .awork-support, a pivoted clamping member adapted to .engage and clamp thework on sand support, a plurality of punches, and means forsimultaneously reciprocating said punches towards the work-support.

16. A machine of the class described comprising the combination of awork-support, a clamping member pivotally mounted to swing into positionabove and clamp the work to said work-support, a plurality of punches,and means for simultaneously reciprocating said punches towards the sidewalls of the work-support.

17. A machine of the class described comprising the combination of awork-support, a clamping member pivotally mounted to swing into positionabove and clamp the work. to said support, a toggle linkage con nectedto said member to lock the same in clamping position, a punch, and meansfor reciprocating said punch towards the worksupport.

' 18. A machine of the class described comprising the combination of awork-support, a clamping member pivoted to one side of and swinging to aposit-ion above the worksupport to clamp the work thereto, a leversuitably fulcrumed, a link connecting one end of said lever to saidclamping member,

said lever and link constituting a toggle for locking the clampingmember in clamping position, a punch, and means for-reciprocating thepunch towards the work-support.

19. A'mac-hine of the class described comprising the combination of awork-support, a clamping member pivoted to one side of and swinging to aposition above the work support to clamp the work thereto, means forlocking said member in clamping position, awork-engaging foot adjustablcarried by said clamping member, a punc and means for reciprocating saidpunch towards the work-support.

20. A machine of prising the combination of a work-support, a clampingmember pivoted to one side of and swingin to a position above saidworkthe class described comsupport to 0 amp the work thereto, a gauge 7plurality of punches reciprocable towards 3! the side wall of saidwork-support.

22. A machine of the class described comprising the oombination of abase, a motor mounted thereon, a power shaft, connections between saidmotor and said shaft including a clutch operable in but one sition ofthe shaft in its revolution, a wor support carried by said base, apunchreciprocable t0- member acting on said power shaft, driving.

connections between said motor and said shaft including a clutchoperable at but one point in the revolution of the shaft, a. worksupportcarried by the base, a punch reciprocable towards said support, andmechanism actuated by said power shaft for reciprocating said punch.

24. In a punching machine, a work support, in combination with means forpunching holes in the work simultaneously at different distances fromthe plane of the base of said support.

25. In a punching machine, a work support having dies disposed atrelatively different distances from the plane of the base of saidsupport, the work engaging over said dies, in combination with punchesrespectively cooperating with saiddies.

26. In a punching machine, a work support having dies disposed atrelatively different distances from the plane of the base of saidsupport, the work engaging over said dies, in combination with punchesrespectively cooperating with said dies, and power driven devices foractuating said punches simultaneously.

27. In a punching machine, a work support, a plurality of dies mountedin the side walls of the work support at relatively dif- .ferentdistances from the plane of the, base of said support, and a pluralityof punches cooperating with said dies.

28. In a punching machine, an inclined work support, a plurality of diesmounted in the side walls of said work support at relatively differentdistances from the plane of the base of said support, the work restingon said inclined work support and having flanges to be perforatedsupported thereby in front of said dies, and a plurality of punchescooperating with said dies.

In testimony whereof ll affix my signature.

WALTER H. DARDENNE.

